#!/usr/bin/env python3 # vim: set fileencoding=utf-8 : """\ YML/YSLT 2 processor version 6.2 Copyleft (c), 2009-2020 Volker Birk http://fdik.org/yml/ """ import sys, os, codecs, locale import fileinput, unicodedata from optparse import OptionParser try: from lxml import etree except: sys.stderr.write("This program needs lxml, see http://codespeak.net/lxml/\n") sys.exit(1) from yml2.grammar import ymlCStyle, comment, oldSyntax from yml2.pyPEG import parse, u import yml2.backend as backend YML_DEFAULT_PATH = [os.path.dirname(backend.__file__)] def printInfo(option, opt_str, value, parser): sys.stdout.write(__doc__) sys.exit(0) class YMLAssert(Exception): pass def w(msg): if isinstance(msg, BaseException): try: msg = str(msg) + "\n" except: msg = u(msg) + "\n" sys.stderr.write(msg) def main(): optParser = OptionParser() optParser.add_option("-C", "--old-syntax", action="store_true", dest="old_syntax", help="syntax of YML 2 version 1.x (compatibility mode)", default=False) optParser.add_option("-D", "--emit-linenumbers", action="store_true", dest="emitlinenumbers", help="emit line numbers into the resulting XML for debugging purposes", default=False) optParser.add_option("--debug", action="store_true", dest="trace", help="switch on tracing to stderr", default=False) optParser.add_option("-d", "--paramdict", dest="params", metavar="PARAMS", help="call X/YSLT script with dictionary PARAMS as parameters") optParser.add_option("-e", "--xpath", dest="xpath", metavar="XPATH", help="execute XPath expression XPATH and print result") optParser.add_option("-E", "--encoding", dest="encoding", metavar="ENCODING", default=locale.getdefaultlocale()[1], help="encoding of input files (default to locale)") optParser.add_option("-I", "--include", dest="includePathText", metavar="INCLUDE_PATH", help="precede YML_PATH by a colon separated INCLUDE_PATH to search for include files") optParser.add_option("-m", "--omit-empty-parm-tags", action="store_true", dest="omitemptyparm", help="does nothing (only there for compatibility reasons)", default=False) optParser.add_option("-M", "--empty-input-document", action="store_true", dest="emptyinput", help="use an empty input document", default=False) optParser.add_option("-n", "--normalization", dest="normalization", metavar="NORMALIZATION", default="NFC", help="Unicode normalization (none, NFD, NFKD, NFC, NFKC, FCD, default is NFC)") optParser.add_option("-o", "--output", dest="outputFile", metavar="FILE", help="place output in file FILE") optParser.add_option("-p", "--parse-only", action="store_true", dest="parseonly", help="parse only, then output pyAST as text to stdout", default=False) optParser.add_option("-P", "--pretty", action="store_true", default=False, help="pretty print output adding whitespace") optParser.add_option("-s", "--stringparamdict", dest="stringparams", metavar="STRINGPARAMS", help="call X/YSLT script with dictionary STRINGPARAMS as string parameters") optParser.add_option("-x", "--xml", action="store_true", default=False, help="input document is XML already") optParser.add_option("-X", "--xslt", dest="xslt", metavar="XSLTSCRIPT", help="execute XSLT script XSLTSCRIPT") optParser.add_option("-y", "--yslt", dest="yslt", metavar="YSLTSCRIPT", help="execute YSLT script YSLTSCRIPT") optParser.add_option("-Y", "--xml2yml", action="store_true", default=False, help="convert XML to normalized YML code") optParser.add_option("-V", "--version", action="callback", callback=printInfo, help="show version info and exit") (options, args) = optParser.parse_args() if options.old_syntax: oldSyntax() if options.trace: backend.enable_tracing = True if options.emitlinenumbers: backend.emitlinenumbers = True if options.includePathText: backend.includePath = options.includePathText.split(':') backend.encoding = options.encoding dirs = os.environ.get('YML_PATH', '.').split(':') + YML_DEFAULT_PATH backend.includePath.extend(dirs) if options.xml2yml: for directory in backend.includePath: name = os.path.join(directory, "xml2yml.ysl2") if os.path.isfile(name): options.yslt = name options.xml = True break else: sys.stderr.write("Error: Stylesheet xml2yml.ysl2 required for --xml2yml not found\n") sys.stderr.write("Please check your YML_PATH\n") sys.exit(1) if (options.xslt and options.yslt) or (options.xslt and options.xpath) or (options.yslt and options.xpath): sys.stderr.write("Cannot combine --xpath, --xslt and --yslt params\n") sys.exit(1) try: ymlC = ymlCStyle() rtext = "" if not options.emptyinput: files = fileinput.input(args, mode="rU", openhook=fileinput.hook_encoded(options.encoding)) if options.xml: rtext = "" for line in files: rtext += line else: result = parse(ymlC, files, True, comment) if options.parseonly: print(result) sys.exit(0) else: rtext = backend.finish(result) if not rtext: rtext = "" def ymldebug(context, text): if options.trace: sys.stderr.write("Debug: " + codecs.encode(u(text), options.encoding) + "\n") return "" def ymlassert(context, value, msg): if options.trace: if not value: raise YMLAssert(msg) return "" ymlns = etree.FunctionNamespace("http://fdik.org/yml") ymlns.prefix = "yml" ymlns['debug'] = ymldebug ymlns['assert'] = ymlassert if options.xpath: tree = etree.fromstring(rtext) ltree = tree.xpath(codecs.decode(options.xpath, options.encoding)) rtext = "" try: for rtree in ltree: rtext += etree.tostring(rtree, pretty_print=options.pretty, encoding=unicode) except: rtext = ltree elif options.yslt or options.xslt: params = {} if options.yslt: backend.clearAll() yscript = fileinput.input(options.yslt, mode="rU", openhook=fileinput.hook_encoded(options.encoding)) yresult = parse(ymlC, yscript, True, comment) ytext = backend.finish(yresult) else: yscript = fileinput.input(options.xslt, mode="rU") ytext = "" for line in yscript: ytext += line doc = etree.fromstring(rtext) xsltree = etree.XML(ytext, base_url=os.path.abspath(yscript.filename())) transform = etree.XSLT(xsltree) if options.params: params = eval(options.params) for key, value in params.items(): if type(value) is not str: params[key] = u(value) if options.stringparams: for key, value in eval(options.stringparams).items(): params[key] = "'" + u(value) + "'" rresult = transform(doc, **params) # lxml is somewhat buggy try: rtext = u(rresult) except: rtext = etree.tostring(rresult, encoding=unicode) if not rtext: rtext = codecs.decode(str(rresult), "utf-8") if options.normalization != "none": rtext = unicodedata.normalize(options.normalization, rtext) if options.pretty: plaintext = etree.tostring(etree.fromstring(rtext), pretty_print=True, xml_declaration=True, encoding=options.encoding) else: if isinstance(rtext, str): plaintext = codecs.encode(rtext, options.encoding) else: plaintext = rtext try: if plaintext[-1] == "\n": plaintext = plaintext[:-1] except: pass if options.outputFile and options.outputFile != "-": outfile = open(options.outputFile, "wb") outfile.write(plaintext) outfile.close() else: sys.stdout.buffer.write(plaintext) if not options.pretty: print() except KeyboardInterrupt: w("\n") sys.exit(1) except YMLAssert as msg: w("YML Assertion failed: " + u(msg) + "\n") sys.exit(2) except KeyError as msg: w("not found: " + u(msg) + "\n") sys.exit(4) except LookupError as msg: w("not found: " + u(msg) + "\n") sys.exit(4) except etree.XMLSyntaxError as e: log = e.error_log.filter_from_level(etree.ErrorLevels.FATAL) for entry in log: w("XML error: " + u(entry.message) + "\n") sys.exit(5) except Exception as msg: w(msg) sys.exit(5) if __name__ == "__main__": main()